1101202220021 has 4 divisors (see below), whose sum is σ = 1102920164844. Its totient is φ = 1099484275200.

The previous prime is 1101202219933. The next prime is 1101202220023. The reversal of 1101202220021 is 1200222021011.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 753226108996 + 347976111025 = 867886^2 + 589895^2 .

It is a cyclic number.

It is not a de Polignac number, because 1101202220021 - 2²⁶ = 1101135111157 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1101202219978 and 1101202220005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1101202220023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 858971450 + ... + 858972731.

It is an arithmetic number, because the mean of its divisors is an integer number (275730041211).

Almost surely, 2^{1101202220021} is an apocalyptic number.

It is an amenable number.

1101202220021 is a deficient number, since it is larger than the sum of its proper divisors (1717944823).

1101202220021 is an equidigital number, since it uses as much as digits as its factorization.

1101202220021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1717944822.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 1101202220021 its reverse (1200222021011), we get a palindrome (2301424241032).

The spelling of 1101202220021 in words is "one trillion, one hundred one billion, two hundred two million, two hundred twenty thousand, twenty-one".